Portion of a printer



FIG. 1 is a front and right side perspective view of a portion of a printer showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is top plan view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of a printer, as shown and described. 